create booking

admin/src/api/utils/http-params-builder.ts

@@ -0,0 +1,65 @@
+import { HttpParams } from "@angular/common/http";
+
+export class HttpParamsBuilder {
+    /** Adds a value to HttpParams. Delegates to recursive handler for objects/arrays. */
+    public static addToHttpParams(httpParams: HttpParams, value: any, key?: string): HttpParams {
+        const isDate = value instanceof Date;
+        const isArray = Array.isArray(value);
+        const isObject = typeof value === "object" && !isDate && !isArray;
+
+        if (isObject) {
+            return this.addToHttpParamsRecursive(httpParams, value);
+        }
+
+        return this.addToHttpParamsRecursive(httpParams, value, key);
+    }
+
+    private static addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
+        if (Array.isArray(value)) {
+            return this.handleArray(httpParams, value, key);
+        }
+
+        if (value instanceof Date) {
+            return this.handleDate(httpParams, value, key);
+        }
+
+        if (typeof value === "object") {
+            return this.handleObject(httpParams, value, key);
+        }
+
+        return this.handlePrimitive(httpParams, value, key);
+    }
+
+    private static handleArray(httpParams: HttpParams, arr: unknown[], key?: string): HttpParams {
+        arr.forEach((element) => {
+            httpParams = this.addToHttpParamsRecursive(httpParams, element, key);
+        });
+        return httpParams;
+    }
+
+    private static handleDate(httpParams: HttpParams, date: Date, key?: string): HttpParams {
+        if (!key) {
+            throw new Error("key may not be null if value is Date");
+        }
+        return httpParams.append(key, date.toISOString().substring(0, 10));
+    }
+
+    private static handleObject(httpParams: HttpParams, obj: Record<string, any>, key?: string): HttpParams {
+        Object.keys(obj).forEach((prop) => {
+            const nestedKey = key ? `${key}.${prop}` : prop;
+            httpParams = this.addToHttpParamsRecursive(httpParams, obj[prop], nestedKey);
+        });
+        return httpParams;
+    }
+
+    private static handlePrimitive(httpParams: HttpParams, value: string | number | boolean, key?: string): HttpParams {
+        if (!key) {
+            throw new Error("key may not be null if value is primitive");
+        }
+        return httpParams.append(key, value);
+    }
+}